Various embodiments of the teachings herein include a battery unit comprising a string of battery modules in series. Each battery module includes a plurality of battery cells in series. Each battery module comprises a respective balancing circuit and a respective power electronics unit with a first DC/DC converter. The respective battery modules are connected in series via the respective power electronics unit. In each battery module, the first DC/DC converter comprises: an input port with two input terminals connected to the battery cells; an output port with two output terminals providing an output voltage; and a power supply port receiving power for the first DC/DC converter from the balancing circuit. The first DC/DC converter sets the output voltage of the battery module to a predetermined value. The balancing circuit extracts energy from a selected battery cells and provides it to the first DC/DC converter or the power electronics unit.
Battery Unit, Method, and Apparatus for Operating the Battery Unit
2023-06-29
Patent
Electronic Resource
English
IPC: | H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER , Schaltungsanordnungen oder Systeme für die Abgabe oder Verteilung elektrischer Leistung / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / H01M Verfahren oder Mittel, z.B. Batterien, für die direkte Umwandlung von chemischer in elektrische Energie , PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY / H02M APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS , Anlagen zur Umformung von Wechselstrom in Wechselstrom, von Wechselstrom in Gleichstrom oder umgekehrt, oder von Gleichstrom in Gleichstrom und zur Verwendung in Netzen oder ähnlichen Stromversorgungssystemen |
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